A lawyer for Avonte Oquendo’s family suspects foul play may have had a role in the boy’s disappearance because underwear found on a body is not the kind the missing boy wore.

Only a DNA match — expected this week — will confirm if the decomposed remains found on a northern Queens beach are those of the Long Island City teen missing since Oct. 4.

But the family’s lawyer, David Perecman, said he is concerned about the large Fruit of the Loom underwear found, since Avonte didn’t wear “large” and wore only Hanes.

“If it is him, what that indicates to me is that something happened,” Perecman said. “Someone got a hold of him, moved him. I can’t say they harmed him, but why would the underwear have gotten changed?”

Avonte, 14, suffered from autism and had difficulty talking.

Authorities said they may have a DNA answer Wednesday.